Convert US gallons per hour to Cubic kilometres per year
Convert US gallons per hour (gph) to Cubic kilometres per year (km³/yr) instantly and accurately.
Conversion Formula
km³/yr = gph × 3.318291970e-8
About US gallons per hour
The US gallon per hour (gph) equals 3.785411784×10⁻³/3600 ≈ 1.051×10⁻⁶ m³/s, common in oil-burner nozzle ratings, water-softener regeneration, and RV/marine-plumbing specifications. Residential oil-burner nozzles are rated in gph (e.g., 0.75 gph, 1.00 gph); a small boat bilge pump might handle 200-500 gph. 1 US gph ≈ 1.052×10⁻⁶ m³/s ≈ 3.785 L/h.
About Cubic kilometres per year
The cubic kilometre per year (km³/yr) equals 10⁹/(365.25×86400) ≈ 31.688 m³/s, the unit used in global hydrology, glaciology, and climate science for river basin runoff, ice-sheet mass balance, and groundwater storage change. Total global freshwater river runoff is ≈37 000 km³/yr; the Amazon alone contributes ≈6 600 km³/yr; the Greenland ice sheet loses ≈280 km³/yr to melt and calving. 1 km³/yr ≈ 31.69 m³/s.
Quick Reference Table
| US gallons per hour (gph) | Cubic kilometres per year (km³/yr) |
|---|---|
| 1 gph | 3.318 × 10-8 km³/yr |
| 2 gph | 6.637 × 10-8 km³/yr |
| 5 gph | 1.659 × 10-7 km³/yr |
| 10 gph | 3.318 × 10-7 km³/yr |
| 25 gph | 8.296 × 10-7 km³/yr |
| 50 gph | 1.659 × 10-6 km³/yr |
| 100 gph | 3.318 × 10-6 km³/yr |